camera_restore.C

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/// \file
/// \ingroup tutorial_eve
///
/// \macro_code
///
/// \author Matevz Tadel
 
void camera_restore(const char *fname, int mode = 0)
{
   TEveManager::Create();
   writeCurrentCamera(fname);
}
 
void writeCurrentCamera(const char *fname)
{
   TGLCamera &c = gEve->GetDefaultGLViewer()->CurrentCamera();
   TFile *f = TFile::Open(fname, "RECREATE");
   c.Write();
   f->Close();
}
 
void readCurrentCamera(const char *fname)
{
   TGLCamera &c = gEve->GetDefaultGLViewer()->CurrentCamera();
   TFile *f = TFile::Open(fname, "READ");
   if (!f)
      return;
 
   if (f->GetKey(c.ClassName())) {
      f->GetKey(c.ClassName())->Read(&c);
      c.IncTimeStamp();
      gEve->GetDefaultGLViewer()->RequestDraw();
   }
}